(1) ARAKI, M.: Analysis of some characters in foliage in a young congested birch (Betula platylla SUKATCHEV var. japonica (MIQ.) stand (A preliminary report). J. Jap. For. Soc. 54: 192-198, 1972 (In Japanese with English summary)
(2) DORE, W. G.: A simple chemical light meter. Ecology 39: 151-152, 1958
(3) FURUKAWA, A.: Influence of air flow rates on photosynthesis and respiration of poplar leaves under various environmental conditions. Environ. Control. 13: 77-85, 1975
(4) GARNIER, B. J. & OHMULA, A.: A method of calculating the direct shortwave radiation income of slopes. J. Appl. Meteor. 7: 796-800, 1968
(5) HAGIHARA, A.: Photosynthesis and respiration rates, and their seasonal changes in Pinus Thunbergii leaves. Trans. 84th Mtg. Jap. For. Soc. 159-161, 1973 (In Japanese)
